./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_max_multiply_32_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_max_multiply_32_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b3ed216060fb8828f0f7e166ef70b20459cef6e0ce947505ff99d00939b12d8d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 20:50:42,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 20:50:42,274 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Default.epf [2024-11-13 20:50:42,283 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 20:50:42,286 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2024-11-13 20:50:42,310 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 20:50:42,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 20:50:42,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-13 20:50:42,311 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 20:50:42,311 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 20:50:42,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 20:50:42,312 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 20:50:42,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 20:50:42,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 20:50:42,312 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 20:50:42,312 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 20:50:42,312 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 20:50:42,313 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 20:50:42,313 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 20:50:42,313 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 20:50:42,313 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 20:50:42,313 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 20:50:42,313 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-13 20:50:42,314 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-13 20:50:42,314 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-13 20:50:42,314 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 20:50:42,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 20:50:42,314 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 20:50:42,314 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 20:50:42,315 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 20:50:42,315 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2024-11-13 20:50:42,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 20:50:42,315 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3ed216060fb8828f0f7e166ef70b20459cef6e0ce947505ff99d00939b12d8d [2024-11-13 20:50:42,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 20:50:42,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 20:50:42,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 20:50:42,656 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 20:50:42,656 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 20:50:42,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_max_multiply_32_bad.i Unable to find full path for "g++" [2024-11-13 20:50:44,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 20:50:45,091 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 20:50:45,091 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_max_multiply_32_bad.i [2024-11-13 20:50:45,122 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/data/00ac76956/15c3cd7200b942ba88f6800725bd8f55/FLAG5a227c28b [2024-11-13 20:50:45,137 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/data/00ac76956/15c3cd7200b942ba88f6800725bd8f55 [2024-11-13 20:50:45,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 20:50:45,141 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 20:50:45,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 20:50:45,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 20:50:45,148 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 20:50:45,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 08:50:45" (1/1) ... [2024-11-13 20:50:45,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37441f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:45, skipping insertion in model container [2024-11-13 20:50:45,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 08:50:45" (1/1) ... [2024-11-13 20:50:45,217 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 20:50:46,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 20:50:46,337 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 20:50:46,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 20:50:46,593 INFO L204 MainTranslator]: Completed translation [2024-11-13 20:50:46,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46 WrapperNode [2024-11-13 20:50:46,594 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 20:50:46,596 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 20:50:46,596 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 20:50:46,596 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 20:50:46,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,622 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,644 INFO L138 Inliner]: procedures = 497, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2024-11-13 20:50:46,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 20:50:46,645 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 20:50:46,645 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 20:50:46,645 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 20:50:46,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,662 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,664 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 20:50:46,669 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 20:50:46,669 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 20:50:46,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 20:50:46,671 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:46" (1/1) ... [2024-11-13 20:50:46,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 20:50:46,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/z3 [2024-11-13 20:50:46,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-13 20:50:46,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-13 20:50:46,745 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-13 20:50:46,745 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-13 20:50:46,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 20:50:46,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 20:50:46,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 20:50:46,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 20:50:46,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 20:50:46,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 20:50:46,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 20:50:46,921 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 20:50:46,923 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 20:50:47,047 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-11-13 20:50:47,047 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 20:50:47,091 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 20:50:47,092 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-13 20:50:47,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:50:47 BoogieIcfgContainer [2024-11-13 20:50:47,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 20:50:47,093 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-13 20:50:47,093 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-13 20:50:47,104 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-13 20:50:47,104 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:50:47" (1/1) ... [2024-11-13 20:50:47,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 20:50:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 20:50:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 14 states and 15 transitions. [2024-11-13 20:50:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-13 20:50:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 20:50:47,175 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 20:50:47,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 20:50:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 20:50:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 20:50:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 20:50:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 13 states and 14 transitions. [2024-11-13 20:50:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-11-13 20:50:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 20:50:47,534 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 20:50:47,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 20:50:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:50:47,605 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 20:50:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:50:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:50:47,723 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 20:50:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:50:47,798 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-13 20:50:47,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 13.11 08:50:47 ImpRootNode [2024-11-13 20:50:47,844 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-13 20:50:47,845 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 20:50:47,845 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 20:50:47,845 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 20:50:47,846 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:50:47" (3/4) ... [2024-11-13 20:50:47,849 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 20:50:47,850 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 20:50:47,854 INFO L158 Benchmark]: Toolchain (without parser) took 2710.25ms. Allocated memory is still 117.4MB. Free memory was 88.6MB in the beginning and 86.3MB in the end (delta: 2.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2024-11-13 20:50:47,854 INFO L158 Benchmark]: CDTParser took 1.04ms. Allocated memory is still 83.9MB. Free memory is still 42.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:50:47,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1452.39ms. Allocated memory is still 117.4MB. Free memory was 88.6MB in the beginning and 80.6MB in the end (delta: 8.1MB). Peak memory consumption was 66.1MB. Max. memory is 16.1GB. [2024-11-13 20:50:47,855 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.82ms. Allocated memory is still 117.4MB. Free memory was 80.6MB in the beginning and 77.7MB in the end (delta: 2.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 20:50:47,856 INFO L158 Benchmark]: Boogie Preprocessor took 23.80ms. Allocated memory is still 117.4MB. Free memory was 77.7MB in the beginning and 77.0MB in the end (delta: 718.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:50:47,860 INFO L158 Benchmark]: RCFGBuilder took 422.71ms. Allocated memory is still 117.4MB. Free memory was 76.3MB in the beginning and 63.1MB in the end (delta: 13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 20:50:47,860 INFO L158 Benchmark]: CodeCheck took 751.54ms. Allocated memory is still 117.4MB. Free memory was 63.1MB in the beginning and 86.4MB in the end (delta: -23.3MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. [2024-11-13 20:50:47,860 INFO L158 Benchmark]: Witness Printer took 5.28ms. Allocated memory is still 117.4MB. Free memory was 86.4MB in the beginning and 86.3MB in the end (delta: 7.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:50:47,863 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 2 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - UnprovableResult [Line: 1563]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of large string literal at line 1571. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1571] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(line)={1:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1571] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1572] CALL CWE190_Integer_Overflow__int_max_multiply_32_bad() [L1550] int data; [L1551] int *dataPtr1 = &data; [L1552] int *dataPtr2 = &data; [L1553] data = 0 [L1555] EXPR \read(*dataPtr1) [L1555] int data = *dataPtr1; [L1556] data = 0x7fffffff [L1557] *dataPtr1 = data [L1560] EXPR \read(*dataPtr2) [L1560] int data = *dataPtr2; [L1561] COND TRUE data > 0 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=2147483647, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1563] data * 2 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.04ms. Allocated memory is still 83.9MB. Free memory is still 42.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1452.39ms. Allocated memory is still 117.4MB. Free memory was 88.6MB in the beginning and 80.6MB in the end (delta: 8.1MB). Peak memory consumption was 66.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.82ms. Allocated memory is still 117.4MB. Free memory was 80.6MB in the beginning and 77.7MB in the end (delta: 2.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.80ms. Allocated memory is still 117.4MB. Free memory was 77.7MB in the beginning and 77.0MB in the end (delta: 718.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 422.71ms. Allocated memory is still 117.4MB. Free memory was 76.3MB in the beginning and 63.1MB in the end (delta: 13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * CodeCheck took 751.54ms. Allocated memory is still 117.4MB. Free memory was 63.1MB in the beginning and 86.4MB in the end (delta: -23.3MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. * Witness Printer took 5.28ms. Allocated memory is still 117.4MB. Free memory was 86.4MB in the beginning and 86.3MB in the end (delta: 7.9kB). There was no memory consumed. Max. memory is 16.1GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 20:50:47,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_max_multiply_32_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b3ed216060fb8828f0f7e166ef70b20459cef6e0ce947505ff99d00939b12d8d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 20:50:50,882 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 20:50:50,991 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf [2024-11-13 20:50:51,036 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 20:50:51,038 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 20:50:51,038 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-13 20:50:51,038 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 20:50:51,039 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 20:50:51,039 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 20:50:51,040 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 20:50:51,040 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 20:50:51,041 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 20:50:51,042 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-13 20:50:51,042 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-13 20:50:51,042 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-13 20:50:51,042 INFO L153 SettingsManager]: * Command for calling external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 20:50:51,042 INFO L153 SettingsManager]: * Choose which separate solver to use for tracechecks=External_ModelsAndUnsatCoreMode [2024-11-13 20:50:51,042 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 20:50:51,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 20:50:51,042 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 20:50:51,042 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 20:50:51,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 20:50:51,043 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-13 20:50:51,043 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 20:50:51,043 INFO L153 SettingsManager]: * Use separate solver for trace checks=false [2024-11-13 20:50:51,043 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3ed216060fb8828f0f7e166ef70b20459cef6e0ce947505ff99d00939b12d8d [2024-11-13 20:50:51,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 20:50:51,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 20:50:51,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 20:50:51,405 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 20:50:51,405 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 20:50:51,406 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_max_multiply_32_bad.i Unable to find full path for "g++" [2024-11-13 20:50:53,367 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 20:50:53,831 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 20:50:53,832 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_max_multiply_32_bad.i [2024-11-13 20:50:53,858 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/data/93d536911/15f0320aaaf24bc5af8f05b7921f218e/FLAG437695941 [2024-11-13 20:50:53,883 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/data/93d536911/15f0320aaaf24bc5af8f05b7921f218e [2024-11-13 20:50:53,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 20:50:53,888 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 20:50:53,890 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 20:50:53,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 20:50:53,898 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 20:50:53,899 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 08:50:53" (1/1) ... [2024-11-13 20:50:53,901 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@410e4e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:53, skipping insertion in model container [2024-11-13 20:50:53,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 08:50:53" (1/1) ... [2024-11-13 20:50:53,967 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 20:50:54,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 20:50:54,966 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 20:50:55,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 20:50:55,279 INFO L204 MainTranslator]: Completed translation [2024-11-13 20:50:55,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55 WrapperNode [2024-11-13 20:50:55,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 20:50:55,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 20:50:55,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 20:50:55,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 20:50:55,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,340 INFO L138 Inliner]: procedures = 502, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2024-11-13 20:50:55,340 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 20:50:55,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 20:50:55,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 20:50:55,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 20:50:55,347 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,358 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 20:50:55,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 20:50:55,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 20:50:55,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 20:50:55,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 20:50:55,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/z3 [2024-11-13 20:50:55,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-13 20:50:55,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-13 20:50:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-13 20:50:55,431 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-13 20:50:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 20:50:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 20:50:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 20:50:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 20:50:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2024-11-13 20:50:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 20:50:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2024-11-13 20:50:55,600 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 20:50:55,602 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 20:50:55,780 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-11-13 20:50:55,780 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 20:50:55,823 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 20:50:55,823 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-13 20:50:55,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:50:55 BoogieIcfgContainer [2024-11-13 20:50:55,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 20:50:55,824 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-13 20:50:55,825 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-13 20:50:55,835 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-13 20:50:55,836 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:50:55" (1/1) ... [2024-11-13 20:50:55,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 20:50:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 20:50:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 14 states and 15 transitions. [2024-11-13 20:50:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-13 20:50:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 20:50:55,903 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 20:50:55,904 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 20:50:55,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/cvc4 [2024-11-13 20:50:55,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 20:50:55,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-13 20:50:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 20:50:56,123 ERROR L567 CodeCheckObserver]: First Tracecheck threw exception Proofs are not supported [2024-11-13 20:50:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 20:50:56,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 20:50:56,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 20:50:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 20:50:56,240 ERROR L418 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Exception during sending of exit command (exit): Broken pipe [2024-11-13 20:50:56,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-13 20:50:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 20:50:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 13 states and 14 transitions. [2024-11-13 20:50:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-11-13 20:50:56,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 20:50:56,286 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 20:50:56,286 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 20:50:56,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/cvc4 [2024-11-13 20:50:56,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 20:50:56,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-13 20:50:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:50:56,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 20:50:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:50:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:50:56,672 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 20:50:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 20:50:56,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-13 20:50:56,754 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-13 20:50:56,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 13.11 08:50:56 ImpRootNode [2024-11-13 20:50:56,790 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-13 20:50:56,791 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 20:50:56,791 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 20:50:56,791 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 20:50:56,792 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 08:50:55" (3/4) ... [2024-11-13 20:50:56,794 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 20:50:56,796 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 20:50:56,799 INFO L158 Benchmark]: Toolchain (without parser) took 2909.23ms. Allocated memory is still 83.9MB. Free memory was 56.6MB in the beginning and 29.3MB in the end (delta: 27.3MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. [2024-11-13 20:50:56,799 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 83.9MB. Free memory is still 65.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:50:56,800 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1389.37ms. Allocated memory is still 83.9MB. Free memory was 56.6MB in the beginning and 52.3MB in the end (delta: 4.3MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. [2024-11-13 20:50:56,802 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.82ms. Allocated memory is still 83.9MB. Free memory was 52.3MB in the beginning and 49.8MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:50:56,803 INFO L158 Benchmark]: Boogie Preprocessor took 30.01ms. Allocated memory is still 83.9MB. Free memory was 49.8MB in the beginning and 48.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:50:56,803 INFO L158 Benchmark]: RCFGBuilder took 452.60ms. Allocated memory is still 83.9MB. Free memory was 47.8MB in the beginning and 32.1MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 20:50:56,803 INFO L158 Benchmark]: CodeCheck took 965.95ms. Allocated memory is still 83.9MB. Free memory was 32.1MB in the beginning and 29.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. [2024-11-13 20:50:56,804 INFO L158 Benchmark]: Witness Printer took 5.10ms. Allocated memory is still 83.9MB. Free memory was 29.8MB in the beginning and 29.3MB in the end (delta: 432.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 20:50:56,806 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 2 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - UnprovableResult [Line: 1563]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of large string literal at line 1571. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1571] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(line)={1:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1571] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1572] CALL CWE190_Integer_Overflow__int_max_multiply_32_bad() [L1550] int data; [L1551] int *dataPtr1 = &data; [L1552] int *dataPtr2 = &data; [L1553] data = 0 [L1555] EXPR \read(*dataPtr1) [L1555] int data = *dataPtr1; [L1556] data = 0x7fffffff [L1557] *dataPtr1 = data [L1560] EXPR \read(*dataPtr2) [L1560] int data = *dataPtr2; [L1561] COND TRUE data > 0 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=2147483647, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1563] data * 2 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 83.9MB. Free memory is still 65.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1389.37ms. Allocated memory is still 83.9MB. Free memory was 56.6MB in the beginning and 52.3MB in the end (delta: 4.3MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.82ms. Allocated memory is still 83.9MB. Free memory was 52.3MB in the beginning and 49.8MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.01ms. Allocated memory is still 83.9MB. Free memory was 49.8MB in the beginning and 48.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 452.60ms. Allocated memory is still 83.9MB. Free memory was 47.8MB in the beginning and 32.1MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * CodeCheck took 965.95ms. Allocated memory is still 83.9MB. Free memory was 32.1MB in the beginning and 29.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. * Witness Printer took 5.10ms. Allocated memory is still 83.9MB. Free memory was 29.8MB in the beginning and 29.3MB in the end (delta: 432.7kB). There was no memory consumed. Max. memory is 16.1GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 20:50:56,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8c5d8e-a366-4a5c-bb79-8192e2ed1a15/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample